Last Monday's puzzle
This sudoku is rated 
(very difficult) and requires the use of advanced techniques.
You may download it as a PDF file for printing, play it online, or view the solution by pressing the appropriate link below the picture.
The following information card shows more technical details about this sudoku puzzle.
Sudoku information card
Publish date
May 8, 2017
Grid size
9x9
Difficulty rating
5
Number of clues
28
Symmetry
Yes